BASAL GANGLIA 



461 



laterally, by (8) A thin lamina of grey matter called the 

 claustrum, which has a smooth medial surface and a scalloped 

 lateral surface. (9) The insula, which lies lateral to the 

 claustrum and consists of a layer of white and a layer of grey 

 matter. It forms the medial wall of (10) A space called 

 the lateral fossa of the hemisphere. The lateral fossa is 



Fibres of forceps minor - 



Genu of corpus callosum 



Subcallosal gyru? 



Paraterminal body 



Ant. horn of lateral ventricle 



Lamina terminali. 1 - 



Anterior commissure 



Right column of fornix 



Stria terminalis 



Thalamus 



Trigonum habenulae 

 Pineal body 



Grey matter of frontal lobe 

 White matter of frontal lobe 



f Caudate nucleus 



Anterior limb of internal capsule 



Putamen ~l Lentiform 



Globus pallidus / nucleus 



Genu of internal capsule 

 Medullary laminae 



Posterior limb of internal capsule 



Retro-lentiform part of 

 internal capsule 



-Optic radiation 



Pulvinar 

 Stria terminalis ,' 

 Caudate nucleus 



FIG. 183. Horizontal section of Corpus Striatum and adjacent parts on the 

 right side, after the dissection represented in Fig. 182 had been made. 

 The line to the anterior horn of the lateral ventricle crosses the right 

 lamina of the septum pellu'cidum. 



bounded on the lateral side by (n) The frontal operculum, 

 anteriorly, and (12) the temporal operculum, posteriorly, and 

 it opens to the exterior by (13) The lateral fissure which 

 passes between the two opercula. (14) At the postero-lateral 

 angle of the thalamus, note a small grey mass (see Fig. 182) ; 

 it is the tail of the caudate nucleus, descending into the roof of 

 the inferior horn of the lateral ventricle. Place the upper 



